Malicious PDF — malware analysis report

Static analysis result for SHA-256 cad82c63d807ce71…

MALICIOUS

PDF

79.5 KB Created: 2021-03-24 00:54:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 594e4791970b8771603b41f9cc8e960a SHA-1: ae338ab32a97a20ccbef84b3395d7a6dcd0effb1 SHA-256: cad82c63d807ce71ba33cfd797d48cc2ce40db9f8f615d8b5df24e1ba462b130
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external URIs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to 'ITIL change management process flow PDF'. The presence of external links indicates an attempt to redirect the user to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://leonvi.ru/award?keyword=itil+change+management+process+flow+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370074/normal_604d41f161389.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366040/normal_6044d4504e3cc.pdfIn PDF document text
    • https://cdn.sqhk.co/tovitaxani/feUhjgh/36751478090.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419206/normal_604502cd6c240.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385004/normal_5fe4f27bca217.pdfIn PDF document text
    • https://cdn.sqhk.co/juvekuvop/rOijhci/wijuruwaboratirejori.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427282/normal_5ffbff096fc20.pdfIn PDF document text
    • https://cdn.sqhk.co/talegejusa/NjhheUa/bpsc_cdpo_syllabus_2018.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/7d6d5d82-0ff0-44fa-a59c-41a4a22d0d6f/lujikabelizapirageki.pdfIn PDF document text
    • http://wirudulobaga.epizy.com/23356101629.pdfIn PDF document text
    • http://dagapevas.rf.gd/botidamozigopogizipifop.pdfIn PDF document text
    • https://968bac2e-1409-45a7-bd11-2c37eba47390.filesusr.com/ugd/c81504_c86e5c0f798042f6ab85a1f555034365.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/03d3d03a-aa90-4e43-abbe-e4ac455a5814/xukopivutarivipudarudakog.pdfIn PDF document text
    • https://3ea853e4-7f2b-4fb0-9229-b04907a1e321.filesusr.com/ugd/d94095_6bb0ccb8035048ddbc3ac0b1c91dff43.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b3bb0a3-7766-49dc-bcca-aba949667cd8/mafagojiwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/003a8e7c-f045-4e63-ba41-609343c167d8/how_to_program_genie_master_remote_garage_door_opener.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93C 5388 bytes
SHA-256: 75aaa47c2aed48a50bfbfe578f2c39a47a607b47b638c9ee636e97147e2ef998
font_01_sfnt_off0000fb5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5C 11564 bytes
SHA-256: cbb426e538d9404928edfd6bdd6e482f5ec22e07418aa5080561d12dfb458c75
font_02_sfnt_off0001229c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1229C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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